Frequency Diverse Array Radar With Time-Dependent Frequency Offset

Khan, Waseem S.; Qureshi, Ijaz Mansoor

doi:10.1109/lawp.2014.2315215

Cited by 166 publications

(85 citation statements)

References 6 publications

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“…Furthermore, the multipath characteristics of the FDA over a ground plane are analyzed in [50]. Additional work was reported in [51]- [54] to exploit the benefit of applying the FDA for synthetic aperture radar (SAR) high-resolution imaging.…”

Section: Introductionmentioning

confidence: 99%

Frequency Diverse Array Antenna: New Opportunities

Wang

2015

IEEE Antennas Propag. Mag.

205

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Phased-array antennas are known for their capability to electronically steer a beam with high effectiveness, but beam steering is fixed in an angle for all range cells. This paper reviews frequency diverse array (FDA) antennas. Different from a phased array, an FDA uses a small frequency increment, as compared with the carrier frequency, across array elements. The use of a frequency increment generates an array factor that is a function of the angle, the time, and the range, allowing the FDA antenna to transmit the energy over the desired range and angle. In addition to analyzing FDA factor characteristics, this paper investigates FDA potential applications in range-dependent energy control and technical challenges in system implementation, with an aim to call for further investigations on the FDA.

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Section: Introductionmentioning

confidence: 99%

Frequency Diverse Array Antenna: New Opportunities

Wang

2015

IEEE Antennas Propag. Mag.

205

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“…In [94], a nonuniform linear array was adopted to decouple the FDA transmit beampattern, but the carrier frequency and/or the frequency increments cannot be altered in real-time because this requires relocating the elements mechanically and consequently it is not implementable in practice. Logarithmically increasing frequency offsets [111] or time-dependent frequency offsets [112] are also suggested to decouple the range-angle beampattern, but it results in poor beamforming performance in the range dimension. Additionally, a subarray based solution was proposed in [113].…”

Section: A Optimal Array Designmentioning

confidence: 99%

An Overview on Time/Frequency Modulated Array Processing

Wang

Farina³

2017

IEEE J. Sel. Top. Signal Process.

192

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Time and frequency modulated arrays have numerous application areas including radar, navigation and communications. Specifically, a time modulated array can create a beampattern with low sidelobes via connecting and disconnecting the antenna elements from the feed network, while the frequency modulated frequency diverse array produces a range-dependent pattern. In this paper, we aim to introduce these advanced arrays to the signal processing community so that more investigations in terms of theory, methods and applications, can be facilitated. The research progress of time/frequency modulated array studies is reviewed and the most recent advances are discussed. Moreover, potential applications in radar and communications are presented, along with their technical challenges, especially in signal processing aspects.Index Terms-Time modulated array, frequency modulated array, frequency diverse array, array signal processing, phasedarray, range-dependent beamforming, multiple-input multipleoutput (MIMO) radar.

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“…In this array, the radiation pattern shown in (1) is time dependent and range-angle dependent. In [12], the time-dependent frequency offset, we called it time-modulated frequency offset, is introduced as given in (2) to compensate the time variation. …”

Section: Ii! From a Perspective Of Diversitymentioning

confidence: 99%

A general look on time-modulated antenna array

Yao

Fang

2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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From the perspective of diversity, spectrum utilization, and the hybrid processing in time domain and in frequency domain, this paper takes a general look and new perspectives on time-modulated antenna array. Some novel ideas, such as the synthesis of 4-D beampattern through 4-D source and the combination of retrodirective technique and the optimization of time-modulated frequency offset, are presented and discussed that may result in the further developments on such array. Finally, the full-wave analysis of the instantaneous and average behaviors on time-modulated antenna arrays is briefly introduced. Index Terms-Time-modulated antenna array, frequency diversity, pattern diversity, synthesis of 4-D beampattern singlesideband modulation, retrodirective antenna array, full-wave analysis.

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Frequency Diverse Array Radar With Time-Dependent Frequency Offset

Cited by 166 publications

References 6 publications

Frequency Diverse Array Antenna: New Opportunities

Frequency Diverse Array Antenna: New Opportunities

An Overview on Time/Frequency Modulated Array Processing

A general look on time-modulated antenna array

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